SeamsCold weatherStrong fitWatch forRepairs
What We InstallEPDM Rubber
Flexible black single-ply
- Seams
- Primed and joined with seam tape
- Cold weather
- Stays pliable through freezing weeks
- Strong fit
- Church halls, shops, low additions
- Watch for
- Lap edges and flashing that age first
- Repairs
- Tape and patch on primed rubber
TPO Membrane
White heat-welded sheet
- Seams
- Fused with hot air
- Cold weather
- Stiffer in deep cold
- Strong fit
- Large warehouses with many units
- Watch for
- Punctures near equipment
- Repairs
- Welded patches on clean membrane
Modified Bitumen
Asphalt sheets in layers
- Seams
- Torched or cold-applied laps
- Cold weather
- Brittle when old and cold
- Strong fit
- Small roofs with heavy foot traffic
- Watch for
- Granule loss and cracked laps
- Repairs
- Hot or cold patch plies
Building movement, the number of roof penetrations, and how the deck can take attachment all shape the choice on a given roof.